This a repost of my original thread since the pics were lost due to Photobucket no longer allowing free 3rd party image linking.
1) Unplug the cord from the wall outlet.
2) Close all the disconnect valves on the input and output hoses.
3) Take the filter to the sink to drain and
4) The output valve AND input valves must be open in order to drain the filter.
5) This picture shows the filter draining.
6) Once the filter is drained, unlatch the clips to remove the pump head and set the pump head aside to clean later.
7) The filter was filthy and this is what the top lattice screen looked like when I removed the pump head from the canister. Remove the lattice screen and clean it using a soft brush or toothbrush.
8) Remove the fine filter pad & rinse it if it is lightly soiled. This one was too dirty so I replaced it. Under the pad is the media bag that I keep the bio-media in. I'm using Eheim Substrat Pro.
9) I don't have a pic of this step but I put the bio-media and media bag in a pail of aquarium water to keep it wet while I clean the rest of the filter. I dunk it a few times to dislodge dirt and debris, changing the water until it remains clear.
10) Clean the blue coarse pads using tap water & a hose sprayer to get all the gunk out. I have untreated well water but I don't think regular treated tap water will hurt anything. These pads can be used multiple times before needing to be replaced.
11) Clean the Ehfimech or ceramic tubes using tap water and a hose sprayer to remove gunk and debris or you can dump them in a pail and flush with water until clean. NOTE: Keep an eye out for any fry that might be hiding in here. I keep a small container of tank water & use a spoon to catch any fry I want to save.
12) Remove the bottom lattice screen and clean with a soft brush. Rinse the canister body with water & a soft cloth. Clean the inlet fitting, hose and valve with a tube brush. Replace the bottom lattice screen with the legs/lugs facing down.
13) Now it's time to clean the pump head. This pic shows the pump cover in the latched position.
14) To gain access to the impeller, rotate the latch. You may need to press down lightly to turn it.
15) Lift the pump cover where shown. I use a pair of tweezers to pry the cover up and then lift it off.
16) Remove the impeller and ceramic shaft by lifting them straight up. Set these parts in a safe place to avoid breaking them. Clean the impeller cavity with a tube brush to remove debris.
17) Clean the impeller with a toothbrush & carefully wipe the ceramic shaft with a soft cloth. Install the impeller shaft in the impeller cavity, making sure the rubber bushing/seat is still in the center cavity. NOTE: Sometimes this rubber bushing comes loose so verify it is in place as this centers the shaft in the cavity.
18) Slide the impeller onto the shaft. I don't show this step but do show the impeller installed in the impeller cavity.
19) Install the pump cover after cleaning it with a toothbrush as shown.
20) Clean the pump cover latch with a toothbrush. NOTE: Verify the 2nd rubber bushing is still installed in the latch. Center the latch over the pump cavity & impeller shaft, gently press it down & rotate it to the locked position.
See Steps 14 and 13 to secure pump cover latch.
21) Clean the pump head with a damp soft cloth or brush. Remove and clean the o-ring with a damp soft cloth & apply some lube or grease to it before reinstalling it. NOTE: Verify the o-ring is not twisted or kinked and doesn't have any major nicks or cuts in it. The o-ring is a wear item and should be replaced if it doesn't seal properly.
22) Now it's time to put the filter media back in. Be sure the bottom lattice screen goes in first with the legs facing the bottom of the filter housing.
23) This is what the cleaned Eheim EhfiMech coarse media looks like.
23) Install the coarse pads after cleaning or replacement.
25) Reinstall the bio media after cleaning.
Continued in next post.